Answer: A. four of the nine
Explanation:
Thunderstorms usually occur at cold fronts.
The Colosseum was used for gladiatorial contests and public spectacles
Explanation:
The Colosseum was a huge Arena in the center of Ancient Rome for staging various forms of entertainment like <u>Gladiator battles,chariot Races,mock naval/sea battles ,animal hunts .</u>
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<u>Colosseum where huge massive structures that displayed wealth ,might and power of Rome</u>